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| What is the actual Size of a Queue? |
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| Northsider |
 Posted: Mon Jun 11, 2007 5:44 am Post subject: What is the actual Size of a Queue? |
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Novice
Joined: 09 Mar 2005
Posts: 16
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Hi all,
I was wondering if there was a way to see the size of a queue (in megabytes, tracks, cylinders) in online and also in an offline situation? (So actual size instead of messages?)
(This would be quite practical in my job, where there are queue managers with pagesets / storage classes existing out of thousands of queue's. And you have to pinpoint a queue which is extremely has hung the psid with the looping of large/small messages. |
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| rtsujimoto |
| Posted: Mon Jun 11, 2007 7:30 am Post subject: |
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Centurion
Joined: 16 Jun 2004
Posts: 119
Location: Lake Success, NY
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| Ii don't know of any *direct* way for determining what you want (short of IBM providing the logic). But, there is a formula in the SAG that is used to size a pageset so, you could write a program that browses a given queue, totaling the bytes for all messages on that queue, and usedthat total in conjunction with the formula to back-in to the (approximate) queue size. |
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| Northsider |
| Posted: Mon Jun 11, 2007 7:53 am Post subject: |
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Novice
Joined: 09 Mar 2005
Posts: 16
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thnx But before i gonna write this script / handy program.. which does a browse in vsam and "calculates / analyse" the size of queue.x, I wanted to know if something like this has already been made?
now a realy noob question - Are messages in a Queue always the same size?  |
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| Vitor |
| Posted: Mon Jun 11, 2007 7:57 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Northsider wrote: |
now a realy noob question - Are messages in a Queue always the same size? |
Only if they're the same kind of message (i.e. written by the same application in response to the same input). There's no MQ reason why messages of different types can't be mixed on a queue, so long as they're less than the queue's maximum message length.
So if your design says that each particular message type is placed on it's own queue for the convienience of the reading application, then yes they are.
If the reading application dynamically determines the message type by a means of it's choice & all the messages are piled up in a single queue, then no they're not.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| rtsujimoto |
| Posted: Mon Jun 11, 2007 8:52 am Post subject: |
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Centurion
Joined: 16 Jun 2004
Posts: 119
Location: Lake Success, NY
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| It doesn't matter what the size of each message is. If it's larger than a CI, it will get split across two or more CIs. The formula takes that into account. You just want to get (the approximate) number of bytes consumed by a queue. |
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